ffi_struct_layout

NAME

ffi_struct_layout() - compute a C struct's field layout

SYNOPSIS

mixed *ffi_struct_layout( int *field_types );

DESCRIPTION

Given an array of scalar type codes (from <ffi.h>), one per struct
field, returns `({ total_size, ({ offset0, offset1, ... }) })`
honoring the platform's alignment rules. Size an ffi_alloc() block to
`total_size` and use the offsets with ffi_read()/ffi_write(). The
tools/ffi generator emits these arrays from a C header.

SEE ALSO

ffi_alloc(3), ffi_read(3), ffi_write(3), ffi_sizeof(3)